ObjectBuilder2 DLL is now gone. The code is now completely contained in the Unity assembly, and you won't need to reference OB2 anymore in your projects using Unity. Over time the ObjectBuilder stuff is going to lose a lot of it's generality and be just the underpinnings for the container.

We're taking a first cut at fixing our exception messages. All the extra BuildFailedException’s that ended up in the inner exception tree are now GONE. Instead, you get a top level ResolutionFailedException, and the InnerException is the actual exception that caused resolution to fail. And the exception message has been reformatted significantly to hopefully get a better description of what the container was doing, and how it ended up where it did, when the error occurred. This is in response to user feedback to provide better error messaging in Unity. We consider this to be a significant improvement, but still need your feedback. In particular, we look forward to specific suggestions about how we could change the messages to be even more descriptive and intuitive. Please reply to this post or via Codeplex discussion thread.